Repository Issues
Microsoft/TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
Issues
Open
discriminated union type matching behaviour changed starting from 5.2.x
Domain: check: Control FlowHelp WantedPossible Improvement
No assignee yetHas a beginner-friendly labelContributing guide available
6 comments0 reactions0 assignees
Open
strictBindCallApply error mentions `this` type mismatch, but elaboration points to parameters, even when `this` type matches
Experience EnhancementHelp WantedSuggestion
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Mapped types created from reverse mapped types with union/intersection constraints don't have declaration linked
Domain: Mapped TypesHelp WantedPossible Improvement
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments1 reaction0 assignees
Open
Generic type comparison results in incorrect error when inferring from undefined type
Domain: Error MessagesHelp WantedPossible Improvement
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
2 comments1 reaction0 assignees
Open
TypeScript cannot always infer the correct type through a user-defined type guard using the 'is' operator.
BugDomain: This-TypingHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
4 comments1 reaction0 assignees
Open
unique symbol + interface + mixin causes TS4058 ("but cannot be named")
BugDomain: Declaration EmitHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
5 comments3 reactions0 assignees
Open
Find All References does not report references in mapped types
Experience EnhancementHelp WantedSuggestion
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Literal tested as key of a certain type cannot be used as an index type
BugDomain: Indexed Access TypesHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment2 reactions0 assignees
Open
Typescript - inlay hints for nested labeled tuples
BugDomain: LS: Inlay HintsHelp Wanted
Why recommendedNo assignee yet · No comments yet
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0 comments1 reaction0 assignees
Open
No semantic token assigned to import names, but available for export
Experience EnhancementHelp WantedSuggestion
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
2 comments5 reactions0 assignees
Open
partial function with generic lost the type constraint
Domain: check: Type InferenceHelp WantedPossible Improvement
Why recommendedNo assignee yet · Has a beginner-friendly label
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1 comment0 reactions0 assignees
Open
Document and/or deprecate Node's getFullStart() vs. pos?
Help WantedInfrastructure
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment0 reactions0 assignees
Open
Misleading error message when interface tries to extend constrained type parameter
Domain: Error MessagesHelp WantedPossible Improvement
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment2 reactions0 assignees
Open
Rename doesn't work on declaration whose name is a string literal
Domain: LS: RefactoringsExperience EnhancementHelp WantedSuggestion
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments5 reactions0 assignees
Open
Generic indexed access on type with optional properties doesn't include `undefined` in its constraint in `exactOptionalPropertyTypes`
Domain: flag: exactOptionalPropertyTypesHelp WantedPossible Improvement
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
2 comments0 reactions0 assignees
Open
Crash when defining `Array` type via `[]` syntax
BugDomain: check: Type CircularityHas ReproHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
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5 comments0 reactions0 assignees
Open
Binary expression in an `if` condition can't narrow identifier reassigned within expression of the optional chain
Experience EnhancementHelp WantedSuggestion
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Weak type not rejected when intersected with `ThisType`
BugDomain: This-TypingHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
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6 comments0 reactions0 assignees
Open
Inferred Promise type breaks ordering of completions
Domain: LS: Completion ListsExperience EnhancementHelp WantedSuggestion
Why recommendedNo assignee yet · No comments yet
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0 comments0 reactions0 assignees
Open
error in Variadic Tuple Types , if i reverse the partial function
Domain: check: Type InferenceHelp WantedPossible Improvement
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
4 comments0 reactions0 assignees